
where \(\zeta \)  in (REF ) and () denotes the corresponding local coordinate
near \(\hat{\mu }_0(x)\)  and \( \hat{\nu }_0(x)\)  (cf. Sect.3, also Appendix C [1]}).
The constants \(\lbrace \lambda _j\rbrace _{j=1,\ldots ,n}\)  in (REF ) are determined by
the normalization condition
\(\int _{a_k} \omega _{\hat{\mu }_0(x), \hat{\nu }_0(x) }^{(3)}=0,\quad k=1,\ldots ,n.\) 
